Watch-case



(No Model.)

J. C. LANDMANN.

WATCH CASE.

Patented Feb. 8, 1887.

N. PETERS. PhobLikhognphnr. vii-mum". w;

U ITED STATES PATENT OFFICE.

JULIUS O. LANDMANN, OF EUREKA, NEVADA.

WATC H-CAS E.

SPECIFICATION forming part of Letters Patent No. 357,395, dated February8, 1887,

Application filed February 15, 1886. Serial No. 192.024. (No model.)

To all whom, it may concern.-

Be it known that J, JULIUS O. LANDMANN, of Eureka-,Eureka county,-Stateof Nevada, have invented an Improvement in \Vatches;

and I hereby declare thefollowing to be a full,

clear, and exact description of the same.

My invention relates to certain improvements in watches, and it is moreespecially designed to protect the movement of the watch from injury incase of its being dropped.

It consists of an interior inclosing case for the movement, this casebeing of smaller diameter than the ordinary exterior case, so as toadmit a spring between the two, by which any accidental jar upon theexterior case will be prevented from acting violently upon the movement.

It also consists in the means of connecting a stem with the interiorworks.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a view of the watch open from the rear, soas to show the interior. Fig. 2shows the back of the watch, with aportion of the 2 5- inner case broken away, showing my improvement. Fig.3 is a'view of the collar and rub ber washer. a A isthe exterior case ofmy watch, and B is the secondary or interior case, within which 0 themovement is to be contained. This secondary case is made of considerablysmaller diameter than the interior of the outer case, and it is so heldthat it does not have actual contact with it by means of a spring, 0,which 3 5 has its center secured above the top of the inner case, itsends extending outward and passing part way round, so as to pressagainst the sides of the case.

D is the stem by which the watch is wound up, and this extends downthrough the center 0 of the spring and into the inner case, where it isconnected with the winding mechanism in the usual or any suitable way.Around this stem is fitted a washer or collar, E, which is made to fitclosely, and may be further secured 4 5 with an elastic gum or rubber,so as to allow the movement of the interior case within the outer onewithout making any opening or a loose joint at this point. By thisconstruction the movement is secure from injury by blows or falls, andthe balance-staff pivots are safe from accident, because the force ofthe fall is broken on account of the loose movement of the inner caseand the elastic spring upon which the force of the blow is expended.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

An interior case containing the movement of a watch, an exterior case oflarger diameter, having a spring interposed between the two, with itsends secured to the inner case, a winding stem extending through thesides of both cases, in combination with a washer through which the stempasses and an elastic 65 collar, whereby the dust is kept out and theinner case allowed to move within the outer one, substantially as hereindescribed.

In witness whereof I have hereunto set my hand.

JULIUS O. LANDMANN.

Witnesses:-

WM. WEAVER, OHRIsr. H. CLARK.

